Top Cyber Security Jobs in London

Leads complex security engineering initiatives, establishes technical strategy and architecture, develops security roadmaps, and embeds security-by-design across cloud, distributed, microservices, and AI-enabled environments. Acts as a security subject matter expert, mentors engineers, evaluates new security capabilities, and supports complex cyber incident and vulnerability response. Requires broad information security expertise, strong stakeholder influence, cloud experience, and technical leadership.

Design and implement security for a cloud-native B2B SaaS platform. Responsibilities include cloud and Kubernetes security, threat modeling, application and infrastructure hardening, vulnerability management, detection and incident response, security automation, and compliance assurance. The role partners with Engineering, SRE, Risk, Product, Legal, and InfoSec teams to embed secure-by-design practices, automate controls through infrastructure as code and CI/CD, and improve security metrics, detection capabilities, and regulatory readiness.

Own administration, configuration, and lifecycle management of security tooling. Improve detection quality and reduce false positives, enforce change control and governance, maintain MITRE ATT&CK mapping and coverage analysis, and drive continuous optimisation of security tooling across enterprise, cloud, and network environments.

Lead cyber security operations to detect, investigate and respond to threats. Monitor detection systems and security appliances, analyse and escalate incidents, maintain logs, contribute to incident response capabilities, and deliver security education and awareness across the organisation while collaborating with internal teams and external partners.

Sell Picus security validation software to enterprise clients, manage complex consultative sales cycles, generate and qualify pipeline, collaborate with partners and internal teams, forecast in CRM, and drive account expansion while staying current on cybersecurity trends.

Support sales reps with product and program information, drive OEM partner growth through strategic programs, create and deliver training, manage sales pipelines, represent partners at events, build relationships with decision-makers, lead partner customer meetings, analyze data for insights, and maintain sales training materials.

Define and govern enterprise security architecture across IT, cloud, digital, and OT. Embed security-by-design (Zero Trust, least privilege), produce standards and guardrails, lead architecture reviews, threat modeling, risk assessments, and influence stakeholders to improve security posture and enable secure technology transformation.

First dedicated security hire to build Wexler's security program across infrastructure, product, and compliance. Own tooling, embed secure-by-design practices, run risk assessments, maintain ISO 27001 ISMS, and demonstrate security posture to customers.

Lead and build Apollo's end-to-end security program: set AppSec strategy, manage partner security relationships, own security tooling and automation (EDR/MDR, IAM, endpoint management), define AI tooling policies, drive ISO 27001/SOC 2 compliance, and administer IT (Google Workspace, onboarding/offboarding). Act as hands-on security implementer and technical point of contact for partners.

Support and maintain MUFG EMEA data network and security infrastructure: own incident management, troubleshoot routing/switching and firewalls, maintain network documentation and diagrams, deliver network project tasks, participate in shift/on-call rotation, and liaise with vendors and internal teams.

Provide strategic information security leadership across EMEA, bridging global security strategy and regional execution. Advise business and technology units on risk and controls, drive control adoption, run security awareness and champion programs, manage governance, audit readiness, reporting, budgeting, and resourcing while embedding security into mission-critical systems and business initiatives.

Provide advanced triage, incident response, and change implementation for complex customer network and security environments. Troubleshoot SD-WAN, routing (OSPF/BGP/MPLS), firewalls, IPS/IDS, switching, DDI and ISP circuits. Act as escalation for junior engineers, maintain documentation, liaise with providers, participate in on-call rota, and lead implementation of change requests and project tasks.

Provide on-the-ground security oversight for film and episodic productions: develop and maintain security plans, assess locations, liaise with vendors and authorities, monitor risks and schedule changes, run briefings, conduct social media research and incident response, and advise production leadership to protect talent, crew, assets and IP.

Lead global sourcing and category management for infrastructure, security, and network spend. Develop and execute sourcing strategies, negotiate contracts, manage supplier performance, drive cost savings and risk mitigation, support supplier transitions and audits, report on category metrics, and collaborate with cross-functional IT and business teams while mentoring team members.

Lead security governance and compliance for New Malden and London sites, maintain accreditation, develop policies, monitor physical/personnel/information controls, manage incidents and investigations, act as Crypto Custodian, and advise stakeholders to ensure secure delivery of defence programmes.

Protect and monitor Liberty Globals tier-1 core network: identify and remediate network security weaknesses, trace BGP/DDoS/malicious traffic, create monitoring use cases and playbooks, liaise with internal and external teams, mentor engineers, and drive implementation of industry best-practice network hygiene.

Provide physical security design and assurance across the project lifecycle for international clients, focusing on electronic security systems (CCTV, access control, intrusion alarms), layered physical protection, standards compliance, surveys, technical specifications, stakeholder coordination, and implementation support. Travel up to 50% across Europe and the Middle East.

Lead and execute complex red team, purple team, assumed-breach, and adversary-emulation engagements. Develop realistic attack objectives and attack paths across enterprise, identity, cloud, and endpoint surfaces, run authorised offensive operations (including social engineering), validate detections, produce evidence-based reports, and mentor junior staff while collaborating with incident response, threat intel, and detection engineering teams.

Manage end-to-end delivery of client security projects onshore and offshore: mobilise personnel, coordinate vendors, ensure compliance, track performance and profitability, produce risk assessments, liaise with clients and deployed teams, and lead operational improvements.

Design, evaluate and deliver cloud security controls across enterprise cloud platforms. Review cloud services, perform threat modeling and security testing, implement IaC and policy-as-code controls, collaborate with infrastructure teams, and act as cloud security subject-matter expert.

Lead security, privacy, and IT strategy for a growing fintech: own application and cloud security, incident detection and response, DLP, GDPR compliance, identity and workplace IT, and govern safe AI adoption while building and advising cross-functional teams.

Lead global cloud reliability, infrastructure, and security for a high-growth B2B SaaS platform. Define infrastructure strategy, improve CI/CD and automation, drive observability and SLOs, enforce security and compliance, and enable engineering teams with scalable, reliable cloud architecture across distributed teams.

Conduct deep technical research to discover novel risks and attack vectors in cloud- and AI-native environments. Produce proofs of risk and technical POCs, define foundational product capabilities, and collaborate with Product and Engineering to translate research into implemented security features and investigations.

Sell Salesforce Platform Cloud products focused on data security, governance and ALM. Collaborate with Account Executives and partners to generate leads, manage full sales cycles, exceed quota, create territory and account plans, enable internal teams, and close enterprise deals while acting as a trusted advisor on Platform capabilities and AI/Agentforce solutions.

Operate and maintain security monitoring systems, detect and investigate incidents, perform incident response and remediation, tune detections, and collaborate with engineering teams to improve security posture.